Williams
Partners L.P. (NYSE: WPZ) announced today that its Transco pipeline
has filed an application with the Federal Energy Regulatory Commission
(FERC) to provide 270,000 dekatherms per day of incremental, year-round
firm natural gas transportation capacity to serve growing markets in
Virginia and North Carolina.

The Virginia Southside Expansion is targeted to be placed into service
by September 2015. It is designed to provide 20,000 dekatherms per day
of natural gas transportation capacity to Piedmont Natural Gas Company
and 250,000 dekatherms per day of natural gas transportation capacity to
Dominion Virginia Power.

“Historically low natural gas prices and the public's desire for cleaner
energy have fueled an increasing need for natural gas service,” said
Frank Ferazzi, vice president and general manager of Williams' Transco
pipeline. “This project is a great opportunity for us to support these
utilities in serving the growing electric power and gas distribution
needs in this region. We look forward to working with the FERC and all
stakeholders to provide essential natural gas supply access in a manner
that is efficient and minimizes environmental impacts.”

The project is designed to consist of approximately 100 miles of new
24-inch diameter pipeline extending from the Transco mainline in
Pittsylvania County, Va., and into Halifax, Charlotte, Mecklenburg, and
terminating in Brunswick County, Va. The pipe would be placed parallel
to the existing Transco pipeline, alongside of the existing utility
corridor. The proposal would also include a new compressor facility in
Pittsylvania County, Va. The capital cost of the project is estimated to
be $298 million.

The Transco pipeline is a 10,200-mile pipeline system which transports
natural gas to markets throughout the northeastern and southeastern
United States. The current system capacity is approximately 9.7 million
dekatherms per day.

Williams Partners L.P. is a leading diversified master limited
partnership focused on natural gas transportation; gathering, treating,
and processing; storage; natural gas liquid (NGL) fractionation; and oil
transportation. The partnership owns interests in three major interstate
natural gas pipelines that, combined, deliver 14 percent of the natural
gas consumed in the United States. The partnership's gathering and
processing assets include large-scale operations in the U.S. Rocky
Mountains and both onshore and offshore along the Gulf of Mexico. Williams
(NYSE: WMB) owns approximately 70 percent of Williams Partners,
including the general-partner interest. More information is available at www.williamslp.com,
where the partnership routinely posts important information.

Portions of this document may constitute “forward-looking statements”
as defined by federal law. Although the partnership believes any such
statements are based on reasonable assumptions, there is no assurance
that actual outcomes will not be materially different. Any such
statements are made in reliance on the “safe harbor” protections
provided under the Private Securities Reform Act of 1995. Additional
information about issues that could lead to material changes in
performance is contained in the partnership's annual reports filed with
the Securities and Exchange Commission.